Tail seal brush for tunnel boring machine

Description

A tail seal brush for a Tunnel Boring Machine (TBM) is a specialized sealing component installed at the rear (tail) of the TBM.

It helps prevent soil, water, and grout from entering the TBM during tunneling by creating a flexible, durable seal around the machine’s shield as the tunnel lining segments are installed. The brush, typically made of high-strength bristles and a resilient backing, works with grease injection systems to maintain a watertight and soil-tight seal, ensuring smooth operation and protecting the machine and tunnel structure.